3BHE034863R0001接口控制模塊，ABB如何使用
ECC DRAM由Falcon內存控制器芯片組控制。Falcon ASIC執(zhí)行雙向交織，具有雙位錯誤檢測和單位錯誤校正。RAM200模塊可用于下表列出了MVME2700內存擴展。除了ECC DRAM之外，RAM200模塊還向兩組（A和B）中的8MB額外64位閃存。跳投者標頭（J9）告訴Falcon芯片組在內存中取板的位置重置向量。根據(jù)J9的配置，重置執(zhí)行來自閃存組A或B。
3BHE034863R0001接口控制模塊MVME712M過渡模塊MVME712M過渡模塊（圖1-3）和P2適配器板是與MVME2700 VME模塊的型號一起使用。MVME712M的特點包括：
? 并行打印機端口（通過P2適配器）? 支持AUI連接的以太網(wǎng)接口（通過P2適配器）
? 四個EIA-232-D多協(xié)議串行端口（通過P2適配器）? SCSI接口（通過P2適配器）用于連接到兩個內部和外部設備? 插座安裝的SCSI端接電阻器，用于電纜末端或中間電纜配置
? 調制解調器連接規(guī)定? SCSI終端電源的綠色LED；以太網(wǎng)黃色LED收發(fā)器功率P2適配器板的功能包括：? 一個50針連接器，用于SCSI布線至MVME712M和/或其他SCSI設備
? 插座安裝的SCSI端接電阻器，用于電纜末端或中間電纜配置
? 由+5V直流電源開發(fā)的熔斷SCSI終端電源接頭P2處
? 一個64針DIN連接器，用于連接EIA-232-D、并行、SCSI、，和以太網(wǎng)信號傳輸至MVME712MMVME761過渡模塊MVME761轉換模塊（圖1-12）和P2適配器板是與MVME2700 VME模塊的型號一起使用。
MVME761的功能包括：
? 并行打印機端口（符合IEEE 1284-I）
? 支持10BaseT/100BaseTX連接的以太網(wǎng)接口
? 兩個EIA-232-D異步串行端口（標識為COM1和前面板上的COM2）
? 兩個同步串行端口（前端的串行3和串行4面板），可配置EIA-232-D、EIA-530、V.35或X.21協(xié)議
? 兩個60針串行接口模塊（SIM）連接器
The ECC DRAM is controlled by the Falcon memory controller chip set.
The Falcon ASICs perform two-way interleaving, with double-bit error
detection and single-bit error correction. RAM200 modules available for
MVME2700 memory expansion are listed in the following table.In addition to the ECC DRAM, the RAM200 module supplies 4MB to
8MB of additional 64-bit Flash memory in two banks (A and B). A jumper
header (J9) tells the Falcon chip set where in memory to fetch the board
reset vector. Depending on the configuration of J9, resets execute either
from Flash memory bank A or from bank B.
MVME712M Transition Module
The MVME712M transition module (Figure 1-3) and P2 adapter board are
used in conjunction with models of the MVME2700 VME modules.
The features of the MVME712M include:
? A parallel printer port (via P2 adapter)
? An Ethernet interface supporting AUI connections (via P2 adapter)
? Four EIA-232-D multiprotocol serial ports (via P2 adapter)
? An SCSI interface (via P2 adapter) for connection to both internal
and external devices
? Socket-mounted SCSI terminating resistors for end-of-cable or
middle-of-cable configurations
? Provision for modem connection? Green LED for SCSI terminator power; yellow LED for Ethernet
transceiver power
The features of the P2 adapter board include:
? A 50-pin connector for SCSI cabling to the MVME712M and/or to
other SCSI devices
? Socket-mounted SCSI terminating resistors for end-of-cable or
middle-of-cable configurations
? Fused SCSI terminator power developed from the +5V DC present
at connector P2
? A 64-pin DIN connector to interface the EIA-232-D, parallel, SCSI,
and Ethernet signals to the MVME712M
MVME761 Transition Module
The MVME761 transition module (Figure 1-12) and P2 adapter board are
used in conjunction with models of the MVME2700 VME module.
The features of the MVME761 include:
? A parallel printer port (IEEE 1284-I compliant)
? An Ethernet interface supporting 10BaseT/100BaseTX connections
? Two EIA-232-D asynchronous serial ports (identified as COM1 and
COM2 on the front panel)
? Two synchronous serial ports (SERIAL 3 and SERIAL 4 on the front
panel), configurable for EIA-232-D, EIA-530, V.35, or X.21
protocols
? Two 60-pin serial interface module (SIM) connectors
